CVE-2019-7306: Byobu Apport hook may disclose sensitive information since it automatically uploads the local user's .screenrc

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MEDIUM 4.3WATCHLISTMITIGATEMITIGATE

CVE-2019-7306 is a medium-severity flaw (CVSS 4.3) affecting byobu, ubuntu linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Byobu Apport hook may disclose sensitive information since it automatically uploads the local user's .screenrc which may contain private hostnames, usernames and passwords. This issue affects: byobu

Why this priority

Public exploit reference
On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.8% (top 22%)
CISA exploited list	No
Weakness	CWE-552
Published	2020-04-17
Last modified	2026-06-17

Publisher (CNA): Canonical Ltd. · Vendor: byobu · canonical

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-04-17 02:15 UTCPublished CVE record published
2026-06-17 02:40 UTCUpdated Record last modified

byobu byobu MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy byobu || rpm -q byobu || byobu --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

canonical ubuntu linux MITIGATE

Affected: 12.04 · 14.04 · 16.04 · 18.04 · 18.10 · 19.04

Fixed in: no fixed release known

Safe to downgrade to: a release before 12.04

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-7306?

byobu: mitigate or apply the listed mitigation; ubuntu linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-7306 being exploited?

CVE-2019-7306 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-7306 affect?

CVE-2019-7306 affects byobu, ubuntu linux. Severity is medium (CVSS 4.3). Byobu Apport hook may disclose sensitive information since it automatically uploads the local user's .screenrc which may contain private hostnames, usernames and passwords. This issue affects: byobu

How urgent is CVE-2019-7306?

Priority 45/100. Public exploit reference; On your watchlist

Software pages

Ubuntu vulnerabilities

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References

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